no have not got a testing kit, i should really
there not neon tetras i cannot remember the name of them but they have a black and white tail with a red head
i have just set up a small tropical tank and after i let it cycle for a week i put 4 tetras in as there a hardy fish and 2 have died now (seemed to die of swim bladder???) the other two left are very inactive and have been so for the last 4-5 days
is it because the fish need to be in groups...